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physics

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While racing on a flat track, a car rounds a curve of 56 m radius and instantaneously experiences a centripetal acceleration of 36 m/s2. How fast was the car going?
I know the answer i s45 I just need to know why ASAP!!!!!!!!!!!!!!!!!!!!

  • physics -

    a = v^2/r
    ar = v^2
    56*36 = v^2
    2016 = v^2
    v = 44.9

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